To tackle this, Solitair Power offers an “indoor air as a service” subscription model for €1 per person per day. And the cost of that energy is the big ‘elephant in the room’ for direct air capture, keeping the price of CO₂ per metric tonne at hundreds of dollars in some cases. In order to catch this amount of CO₂, the startup would need to use 10,500mWh of electricity. If we placed our systems around the city we could capture 222 tonnes in eight hours, and that’s just one city,” he says. “Helsinki’s metropolitan area has 8.75 square metres of office space. While it’s a considerably lower amount of CO₂ captured compared to startups like Carbon Clean, Laakso notes that if buildings used the technology on a large scale it could make a huge difference. Annually, that’s 20 tonnes of CO₂ captured per year, the same amount it would take 20 trees with a lifespan of 100 years each to capture. Laakso describes the business relationship with Wartsila as in “close cooperation”, helping the startup reach potential international clients.īut how much CO₂ can it grab? And how much energy does this require? “In an office of 2000m2, one ventilator captures 50kg of CO₂ per 8 hour day,” says Laakso. However, it is backed by 187-year-old ship engine and power plant maker Wartsila, which raised its $600k seed funding round in 2019. The startup sold its first commercial unit in February 2020 - although it won’t disclose who its customers are. Petri Laakso, chief executive of Soletair Power.
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